The metal sheets feeding happen by two or four unwinding wheels where the coils will be loaded by as much motorised loading cradle. The installation of two or four units depends on the productivity that the plant must done. The profiling of the sheets is made by roll-formers. These machine make, by profiling rollers, the profiles for upper and lower sheet. The roll-formers permit to obtain profile for wall panel with visible screw, hidden screw and roof panels with two or more deep corrugations. The corrugation in the center ot the sheet is made by micro-corrugation rollers.